53 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_pcm_open()  local
56 	chip->snd_substream = substream;  in snd_usbtv_pcm_open()
64 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_pcm_close()  local
66 	if (atomic_read(&chip->snd_stream)) {  in snd_usbtv_pcm_close()
67 		atomic_set(&chip->snd_stream, 0);  in snd_usbtv_pcm_close()
68 		schedule_work(&chip->snd_trigger);  in snd_usbtv_pcm_close()
78 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_hw_params()  local
84 		dev_warn(chip->dev, "pcm audio buffer allocation failure %i\n",  in snd_usbtv_hw_params()
100 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_prepare()  local
102 	chip->snd_buffer_pos = 0;  in snd_usbtv_prepare()
103 	chip->snd_period_pos = 0;  in snd_usbtv_prepare()
110 	struct usbtv *chip = urb->context;  in usbtv_audio_urb_received()  local
111 	struct snd_pcm_substream *substream = chip->snd_substream;  in usbtv_audio_urb_received()
127 		dev_warn(chip->dev, "unknown audio urb status %i\n",  in usbtv_audio_urb_received()
131 	if (!atomic_read(&chip->snd_stream))  in usbtv_audio_urb_received()
137 	buffer_pos = chip->snd_buffer_pos;  in usbtv_audio_urb_received()
138 	period_pos = chip->snd_period_pos;  in usbtv_audio_urb_received()
170 	chip->snd_buffer_pos = buffer_pos;  in usbtv_audio_urb_received()
171 	chip->snd_period_pos = period_pos;  in usbtv_audio_urb_received()
181 static int usbtv_audio_start(struct usbtv *chip)  in usbtv_audio_start()  argument
209 	chip->snd_bulk_urb = usb_alloc_urb(0, GFP_KERNEL);  in usbtv_audio_start()
210 	if (chip->snd_bulk_urb == NULL)  in usbtv_audio_start()
213 	pipe = usb_rcvbulkpipe(chip->udev, USBTV_AUDIO_ENDP);  in usbtv_audio_start()
215 	chip->snd_bulk_urb->transfer_buffer = kzalloc(  in usbtv_audio_start()
217 	if (chip->snd_bulk_urb->transfer_buffer == NULL)  in usbtv_audio_start()
220 	usb_fill_bulk_urb(chip->snd_bulk_urb, chip->udev, pipe,  in usbtv_audio_start()
221 		chip->snd_bulk_urb->transfer_buffer, USBTV_AUDIO_URBSIZE,  in usbtv_audio_start()
222 		usbtv_audio_urb_received, chip);  in usbtv_audio_start()
225 	usbtv_set_regs(chip, setup, ARRAY_SIZE(setup));  in usbtv_audio_start()
227 	usb_clear_halt(chip->udev, pipe);  in usbtv_audio_start()
228 	usb_submit_urb(chip->snd_bulk_urb, GFP_ATOMIC);  in usbtv_audio_start()
233 	usb_free_urb(chip->snd_bulk_urb);  in usbtv_audio_start()
234 	chip->snd_bulk_urb = NULL;  in usbtv_audio_start()
240 static int usbtv_audio_stop(struct usbtv *chip)  in usbtv_audio_stop()  argument
253 	if (chip->snd_bulk_urb) {  in usbtv_audio_stop()
254 		usb_kill_urb(chip->snd_bulk_urb);  in usbtv_audio_stop()
255 		kfree(chip->snd_bulk_urb->transfer_buffer);  in usbtv_audio_stop()
256 		usb_free_urb(chip->snd_bulk_urb);  in usbtv_audio_stop()
257 		chip->snd_bulk_urb = NULL;  in usbtv_audio_stop()
260 	usbtv_set_regs(chip, setup, ARRAY_SIZE(setup));  in usbtv_audio_stop()
279 	struct usbtv *chip = container_of(work, struct usbtv, snd_trigger);  in snd_usbtv_trigger()  local
281 	if (atomic_read(&chip->snd_stream))  in snd_usbtv_trigger()
282 		usbtv_audio_start(chip);  in snd_usbtv_trigger()
284 		usbtv_audio_stop(chip);  in snd_usbtv_trigger()
289 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_card_trigger()  local
295 		atomic_set(&chip->snd_stream, 1);  in snd_usbtv_card_trigger()
300 		atomic_set(&chip->snd_stream, 0);  in snd_usbtv_card_trigger()
306 	schedule_work(&chip->snd_trigger);  in snd_usbtv_card_trigger()
313 	struct usbtv *chip = snd_pcm_substream_chip(substream);  in snd_usbtv_pointer()  local
315 	return chip->snd_buffer_pos;  in snd_usbtv_pointer()